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WO2000003552A3 - Communication system with reduced power variation and method therefor - Google Patents

Communication system with reduced power variation and method therefor Download PDF

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Publication number
WO2000003552A3
WO2000003552A3 PCT/EP1999/004734 EP9904734W WO0003552A3 WO 2000003552 A3 WO2000003552 A3 WO 2000003552A3 EP 9904734 W EP9904734 W EP 9904734W WO 0003552 A3 WO0003552 A3 WO 0003552A3
Authority
WO
WIPO (PCT)
Prior art keywords
symbols
power variation
transmitted
subchannel
communication system
Prior art date
Application number
PCT/EP1999/004734
Other languages
French (fr)
Other versions
WO2000003552A2 (en
Inventor
Rorie O'neill
Original Assignee
Motorola Ltd
Neill Rorie O
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Ltd, Neill Rorie O filed Critical Motorola Ltd
Priority to JP2000559703A priority Critical patent/JP4294221B2/en
Priority to US09/743,593 priority patent/US7031397B1/en
Priority to EP99934599A priority patent/EP1145573B1/en
Priority to DE69905948T priority patent/DE69905948T2/en
Publication of WO2000003552A2 publication Critical patent/WO2000003552A2/en
Publication of WO2000003552A3 publication Critical patent/WO2000003552A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
    • H04L27/3416—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H04L1/0043—Realisations of complexity reduction techniques, e.g. use of look-up tables
    • H04L1/0044—Realisations of complexity reduction techniques, e.g. use of look-up tables specially adapted for power saving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/186—Phase-modulated carrier systems, i.e. using phase-shift keying in which the information is carried by both the individual signal points and the subset to which the individual signal points belong, e.g. coset coding or related schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H04L27/2615—Reduction thereof using coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0059—Convolutional codes
    • H04L1/006—Trellis-coded modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Error Detection And Correction (AREA)

Abstract

The invention relates to a communication system employing subchannel communication such as OFDM or multicode CDMA. A significant disadvantage of subchannel communication is the power variation of the transmitted signal. The invention provides a system and method with reduced power variation without compromising performance or increasing transmission bandwidth. According to the invention the information symbols to be transmitted on the individual subchannel are fed to encoders (809-815) which maps the information symbols into channel symbols by increasing the order of the symbols. The encoding is both in response to a forward error correction scheme and includes selection between redundant symbol values to reduce power variation of the combined signal. The channel symbols are fed to a modulator (309) and the modulated signal is transmitted. Preferably the encoder comprises a trellis coder jointly encoding the information symbols and compensation data set to reduce the power level variation.
PCT/EP1999/004734 1998-07-11 1999-07-05 Communication system with reduced power variation and method therefor WO2000003552A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2000559703A JP4294221B2 (en) 1998-07-11 1999-07-05 Communication system and method with reduced power fluctuation
US09/743,593 US7031397B1 (en) 1998-07-11 1999-07-05 Communication system with reduced power variation and method therefor
EP99934599A EP1145573B1 (en) 1998-07-11 1999-07-05 Communication system with reduced power variation and method therefor
DE69905948T DE69905948T2 (en) 1998-07-11 1999-07-05 COMMUNICATION SYSTEM WITH REDUCED PERFORMANCE VARIATION AND METHOD FOR IT

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9815025.3 1998-07-11
GB9815025A GB2339514A (en) 1998-07-11 1998-07-11 Cellular communication system with reduced power variation

Publications (2)

Publication Number Publication Date
WO2000003552A2 WO2000003552A2 (en) 2000-01-20
WO2000003552A3 true WO2000003552A3 (en) 2001-10-11

Family

ID=10835320

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/004734 WO2000003552A2 (en) 1998-07-11 1999-07-05 Communication system with reduced power variation and method therefor

Country Status (6)

Country Link
US (1) US7031397B1 (en)
EP (1) EP1145573B1 (en)
JP (1) JP4294221B2 (en)
DE (1) DE69905948T2 (en)
GB (1) GB2339514A (en)
WO (1) WO2000003552A2 (en)

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FR2804560B1 (en) * 2000-01-31 2006-08-04 Commissariat Energie Atomique CDMA RADIOCOMMUNICATION METHOD WITH ACCESS CODES AND CORRESPONDING RECEIVER
EP1128623A1 (en) * 2000-02-24 2001-08-29 Alcatel Method to minimise transmission power of idle ATM cells in a XDSL system with trellis coded modulation
JP2001358692A (en) * 2000-06-14 2001-12-26 Nec Corp Orthogonal frequency-division multiplex modulating and demodulating circuit
EP1386435B1 (en) * 2001-05-08 2007-04-18 Siemens Aktiengesellschaft Method and device for transmitting data in a multi-carrier system comprising parallel concatenated coding and modulation
CA2427315C (en) * 2001-08-31 2008-10-14 Samsung Electronics Co., Ltd. Apparatus and method for transmitting and receiving forward channel quality information in a mobile communication system
US20030053493A1 (en) * 2001-09-18 2003-03-20 Joseph Graham Mobley Allocation of bit streams for communication over-multi-carrier frequency-division multiplexing (FDM)
US7336680B2 (en) * 2001-09-18 2008-02-26 Scientific-Atlanta, Inc. Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service
ATE309652T1 (en) * 2001-11-16 2005-11-15 Matsushita Electric Ind Co Ltd ARQ RETRANSMISSION METHOD WITH INCREMENTAL REDUNDANCY USING BIT REORDERING TYPES
US7289494B2 (en) * 2001-12-06 2007-10-30 Pulse-Link, Inc. Systems and methods for wireless communication over a wide bandwidth channel using a plurality of sub-channels
US7590145B2 (en) * 2002-09-17 2009-09-15 Scientific-Atlanta, Inc. Multiplexing octets from a data flow over MPEG packets
US8781006B2 (en) * 2010-05-21 2014-07-15 Qualcomm Incorporated Link adaptation in multi-carrier communication systems
GB2496379A (en) 2011-11-04 2013-05-15 Univ Edinburgh A freespace optical communication system which exploits the rolling shutter mechanism of a CMOS camera
US9893756B1 (en) * 2015-03-06 2018-02-13 Aquantia Corp. Methods and apparatus to improve SNR for signaling across multi-channel cables

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WO1996013918A1 (en) * 1994-10-31 1996-05-09 Airnet Communications Corporation Reducing peak-to-average variance of a composite transmitted signal generated by a digital combiner via carrier phase offset
WO1997026743A1 (en) * 1996-01-17 1997-07-24 Motorola Ltd. Multicarrier communication system and method for peak power control
DE19625054A1 (en) * 1996-06-22 1998-01-02 Deutsche Telekom Ag Multi carrier signal transmission method
EP0822690A2 (en) * 1996-07-30 1998-02-04 Lucent Technologies Inc. Coding for the reduction of peak to average power ratio in multicarrier modulation systems
WO1998011698A1 (en) * 1996-09-10 1998-03-19 Hewlett-Packard Company Methods and apparatus for encoding and decoding data
US5914933A (en) * 1996-03-08 1999-06-22 Lucent Technologies Inc. Clustered OFDM communication system

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FR2672755B1 (en) * 1991-02-12 1993-05-07 Thomson Csf BINARY CODING METHOD OF THE POINTS OF A CONSTELLATION USED IN A MULTI-CARRIER MODULATION OF THE OFDM TYPE.
US5493586A (en) * 1991-03-28 1996-02-20 British Telecommunications Public Limited Company TCM scheme with fractional bit rates, framing signals and constellation shaping
GB9217819D0 (en) * 1992-08-21 1992-10-07 Philips Electronics Uk Ltd Data coding system
US5642384A (en) * 1993-07-06 1997-06-24 Ericsson Inc. Trellis coded modulation scheme with low envelope variation for mobile radio by constraining a maximum modulus of a differential phase angle
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WO1996013918A1 (en) * 1994-10-31 1996-05-09 Airnet Communications Corporation Reducing peak-to-average variance of a composite transmitted signal generated by a digital combiner via carrier phase offset
WO1997026743A1 (en) * 1996-01-17 1997-07-24 Motorola Ltd. Multicarrier communication system and method for peak power control
US5914933A (en) * 1996-03-08 1999-06-22 Lucent Technologies Inc. Clustered OFDM communication system
DE19625054A1 (en) * 1996-06-22 1998-01-02 Deutsche Telekom Ag Multi carrier signal transmission method
EP0822690A2 (en) * 1996-07-30 1998-02-04 Lucent Technologies Inc. Coding for the reduction of peak to average power ratio in multicarrier modulation systems
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Also Published As

Publication number Publication date
GB2339514A (en) 2000-01-26
JP4294221B2 (en) 2009-07-08
US7031397B1 (en) 2006-04-18
DE69905948D1 (en) 2003-04-17
EP1145573B1 (en) 2003-03-12
WO2000003552A2 (en) 2000-01-20
EP1145573A3 (en) 2002-01-02
GB9815025D0 (en) 1998-09-09
DE69905948T2 (en) 2003-08-28
EP1145573A2 (en) 2001-10-17
JP2002520961A (en) 2002-07-09

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